It refines and extends a method for parameterisation of cirrus cloud. The parameterisation is designed for use in global climate-and-chemistry models (i.e., CCMs, GCMs and CTMs) but has also been used in a Lagrangian framework to provide forecasts for the TroCCiNOx, SCOUT-O3, and AMMA measurement campaigns RAE_import_type : Journal article RAE_uoa_type : Earth Systems and Environmental Sciences